I can understand forgetting your glasses.
I can understand seeing them late in a session.
I can understand contacting the client in question.
I can't understand doing this during the session. If the client relies on the glasses so much that it can't be done another day, they'll be on their way back anyways. It's their fault they lost it. I know it doesn't take long to contact people, but it's rude to interrupt your conversation for other contact like that. And if I pay you for your time, even more so, I agree with Artie